JIC fittings, short for Joint Industry Council fittings, are a type of hydraulic fitting with a 37-degree flare seating surface on both the male and female fittings. The male fitting has a straight thread with a 37-degree flare at the end, while the female fitting has a straight thread and a matching chamfer to accommodate the flare. This design ensures a metal-to-metal seal when the fittings are tightened. It consists of three components to make a tubing assembly: body, nut and sleeve.

NPT: NPT which stand for National Pipe Thread, have a 60-degree included angle and are measured in threads per inch (TPI). The taper of the threads allows for a tighter seal compared to straight threads. NPT fittings feature tapered threads, meaning the threads are cut at a slight angle to the axis of the fitting. This taper creates a seal as the male and female threads are tightened together.

BSP: British Standard Pipe (BSP) thread fittings are widely used in plumbing, hydraulic, and pneumatic systems. The thread angle is 55 degrees. BSP threads come in two main variations: BSP parallel (BSPP) and BSP tapered (BSPT). BSPP threads have a consistent diameter along their length, making them suitable for sealing with a washer or O-ring. BSPT threads have a tapered design, where the diameter of the thread decreases gradually along the length.

Ferrule Compression Fittings: Ferrule fittings consist of components such as Nut, Back Ferrule, Front Ferrule and Body. Ferrule is also known as compression ring or olive. The nut is threaded onto the body, and the ferrule is placed over the tubing. When the nut is tightened onto the body, it compresses the ferrule onto the tubing, creating a tight seal. Strong leak free joint is formed by attaching the tube with compression fittings by swaging.

ORFS: These fittings can be disassembled and reassembles many times, can replace the O ring and tighten it to the recommended torque. O-Ring Faced Seal Fittings works well for both fluid and gases and are easy to be installed. They are used assembled on the high vibration lines and systems due to its capability to absorb shock because of its soft sealing nature. They meet the specifications of SAE J1453-1, 2, 3.